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 Car radio with electric motor tuning
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 Return to top of page · Post #: 1 · Written at 12:17:04 PM on 30 July 2011.
Rob D's Gravatar
 Location: Perth, WA
 Member since 23 January 2011
 Member #: 820
 Postcount: 59

Hi all,
I remember my [much] older brother fitting a new car radio to the family HR not long after our father bought it back when they were new.

The radio had, instead of individual buttons for auto station selection, a single black bar that when pressed, started an electric motor which drove the tuning mechanisim until it sensed increased agc, which stopped the motor on that station.
When it got to the end of the dial, it would spring snap back to the other end.

I think it was called 'Pressmatic', made by who I can't remember. Maybe Ferris??

Does anyone recognise this radio, any info that anyone can share would be much appreciated.


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Currently restoring Astor HMQ 32vdc
Completed and working great!!

 
 Return to top of page · Post #: 2 · Written at 12:53:39 PM on 30 July 2011.
Wa2ise's avatar
 Location: Oradell, US
 Member since 2 April 2010
 Member #: 643
 Postcount: 766

In the USA there were car radios that called this function "Wonderbar", think Callidac had these. Back when car radios used tubes, late 50's. There were signal handling tubes that operated off 12VDC, and a tube driver to drive a transistor that drove the speaker, And I think they used the same or similar transistor driver tube to work the solonoid that operated the tuning motor.


 
 Return to top of page · Post #: 3 · Written at 8:41:41 PM on 30 July 2011.
Rob D's Gravatar
 Location: Perth, WA
 Member since 23 January 2011
 Member #: 820
 Postcount: 59

"Whale-oil-beef-hooked!" Never seen those before and they seem to be all over the internet!!

http://www.vintageautoradio.com/index.php?page=...&Itemid=67

The one we had didn't have the preset buttons, only the solid bar which was black plastic, below the dial with nothing written on it and all solid sate as those in the link appear to be.

Thanks for the heads-up on the "Wonderbar"!! [sounds a tad Deutsch Smile ] It's certainly similar.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
Currently restoring Astor HMQ 32vdc
Completed and working great!!

 
 Return to top of page · Post #: 4 · Written at 1:49:29 AM on 31 July 2011.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6016

Pressmatic was a 5 push button AWA radio.

Check eBay item 170665867606 for a picture.

Another popular brand for Holden was Astor AirChief "Diamond Dot". We had one of those in our EH.

http://t0.gstatic.com/images?q=tbn:AN...

I don't recall seeing any local brand single bar tuning car radios and the only Delco Wonderbar radio I've seen is in a mate's C2 Corvette.

However, back in the day radios were often aftermarket items rather than manufacturer options. I don't recall the Delco brand being available here other than on American GM imports. Perhaps your brother got one second hand?


 
 Return to top of page · Post #: 5 · Written at 10:50:16 AM on 2 August 2011.
Cool386's Gravatar
 Location: Blue Mountains, NSW
 Member since 30 June 2011
 Member #: 944
 Postcount: 30





 
 Return to top of page · Post #: 6 · Written at 3:55:21 AM on 3 August 2011.
Rob D's Gravatar
 Location: Perth, WA
 Member since 23 January 2011
 Member #: 820
 Postcount: 59

Yes, I have a memory that it was an import.
Here's another variation in valve form - the Ford "Town and Country".
It has a split top bar, one for "Town" - motor seek with reduced sensitivity and the other for "Country" - motor seek with full sensitvity.
It even featured a foot switch to activate the tuner motor!

Image Link


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
Currently restoring Astor HMQ 32vdc
Completed and working great!!

 
 Return to top of page · Post #: 7 · Written at 9:55:52 AM on 19 March 2012.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6016

There is a schematic for a 1961 GM Wonderbar car radio on eBay at the moment.

eBay item number: 380419857782


 
 Return to top of page · Post #: 8 · Written at 8:53:11 PM on 1 June 2012.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6016

And another 1961 GM Wonderbar schematic plus set of valves on eBay:

Item number: 380443929538


 
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